Abstract
Several types of stalk shredding machines were tested for efficiency in destroying field populations of pink bollworm (Pectinophora gossypiella (Saund.)) larvae. Kills of up to 88% of the larvae were obtained, depending on type of machine used. Best results over all tests were obtained with the flail chopper. The conventional rotary stalk shredders were the least efficient. Plowing tests and winter burial studies indicated that 76% to 83% of the pink bollworm larvae in infested cotton debris were killed by burying the material during the winter. Survival of pink bollworms in infested cotton left over winter on the soil surface averaged 51.6%. These data emphasize the importance of and the benefits that may be obtained by a thorough job of stalk destruction.
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